The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 01, 2019
Filed:
Jun. 22, 2015
Seiko Epson Corporation, Tokyo, JP;
Yuiga Hamade, Fujimi-machi, JP;
Tetsuji Fujita, Chino, JP;
Seiko Epson Corporation, , JP;
Abstract
To provide a light-emitting element which emits light in a near-infrared range and has high efficiency and long life, and a light-emitting device, an authentication device, and an electronic apparatus, each of which includes this light-emitting element. A light-emitting elementof the invention includes an anode, a cathode, a light-emitting layerwhich is provided between the anodeand the cathodeand emits light in a wavelength range of 700 nm or more by applying a current between the anodeand the cathode, and an electron transport layerwhich is provided between the light-emitting layerand the cathode, and includes a first electron transport layerlocated on the cathodeside and a second electron transport layerlocated on the light-emitting layerside, wherein the first electron transport layercontains a first anthracene-based compound, which has an anthracene skeleton and a nitrogen-containing heterocyclic skeleton, and has an average thickness of less than 8 nm, and the second electron transport layercontains a second anthracene-based compound, which has an anthracene skeleton but does not have a heterocyclic skeleton.